Romelu Lukaku's proposed move to Everton threatens to collapse amid reports that Chelsea are seeking £30m for the striker.

The Blues are also understood to be requesting that the Belgium international joins up with the squad in the Netherlands for their pre-season preparations, despite a sense that his future lies away from Stamford Bridge.

That feeling is mutual, with his 15 Premier League goals last term convincing Roberto Martinez he wants the 21-year-old back at Goodison Park for the upcoming campaign. The Toffees manager only yesterday appeared confident of completing a deal when he told fans in Thailand "of course we'll get him" when asked about the arrival of Lukaku.

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However, the price put on the striker's head by Chelsea could hinder a move.

Everton were understood to be preparing a bid in the region of £23m - a fee that would already make Lukaku the club's most expensive ever signing.

Should Everton fall by the wayside, there are a number of other suitors to have been linked with a move. Bundesliga side Wolfsburg and Serie A champions Juventus are among them. And perhaps most surprisingly, Real Madrid have been linked.

Chelsea will be aware they must balance their desire to get the highest possible fee with the need to offload foreign players if they are to obey domestic and Champions League rules relating to the home-grown quota, whilst also remaining aware that Lukaku's contract will expire in 2016 and the fee they could command will likely drop if he is not sold during the current transfer window.

Didier Drogba's return to Chelsea will limit Lukaku's chances

That Diego Costa and Didier Drogba have arrived this summer suggests Jose Mourinho has little need for Lukaku in the upcoming campaign.